# std::money_get

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< cpp‎ | locale

Defined in header `<locale>` |  |
template< class CharT, class InputIt = std::istreambuf_iterator<CharT> > class money_get; |  |

Class template `std::money_get` encapsulates the rules for parsing monetary values from character streams. The standard I/O manipulator std::get_money uses the `std::money_get` facet of the I/O stream's locale.

Inheritance diagram

If a `std::money_get` specialization is not guaranteed to be provided by the standard library (see below), the behaviors of its get() and do_get() are not guaranteed as specified.

### Specializations

The standard library is guaranteed to provide the following specializations (they are required to be implemented by any locale object):

Defined in header `<locale>`
std::money_get<char> | parses narrow string representations of monetary values
std::money_get<wchar_t> | parses wide string representations of monetary values

In addition, the standard library is also guaranteed to provide every specialization that satisfies the following type requirements:

- `CharT` is one of
  - char,
  - wchar_t, and
  - any other implementation-defined character container type that meets the requirements for a character on which any of the iostream components can be instantiated; and
- `InputIt` must meet the requirements of LegacyInputIterator.

### Nested types

Type | Definition
`char_type` | `CharT`
`string_type` | std::basic_string<CharT>
`iter_type` | `InputIt`

### Data members

Member | Description
std::locale::id `id` [static] | the identifier of the facet

### Member functions

(constructor) | constructs a new `money_get` facet (public member function)
get | invokes `do_get` (public member function)

### Protected member functions

(destructor) | destructs a `money_get` facet (protected member function)
do_get [virtual] | parses a monetary value from an input stream (virtual protected member function)

### Example

Run this code

    #include <iomanip>
    #include <iostream>
    #include <iterator>
    #include <locale>
    #include <sstream>

    int main()
    {
        std::string str = "$1.11 $2.22 $3.33";
        std::cout << std::fixed << std::setprecision(2);

        std::cout << '\"' << str << "\" parsed with the I/O manipulator: ";
        std::istringstream s1(str);
        s1.imbue(std::locale("en_US.UTF-8"));

        long double val;
        while (s1 >> std::get_money(val))
            std::cout << val / 100 << ' ';
        std::cout << '\n';

        str = "USD  1,234.56";
        std::cout << '\"' << str << "\" parsed with the facet directly: ";
        std::istringstream s2(str);
        s2.imbue(std::locale("en_US.UTF-8"));

        auto& f = std::use_facet<std::money_get<char>>(s2.getloc());
        std::ios_base::iostate err;
        std::istreambuf_iterator<char> beg(s2), end;
        f.get(beg, end, true, s2, err, val);

        std::cout << val / 100 << '\n';
    }

Output:

    "$1.11 $2.22 $3.33" parsed with the I/O manipulator: 1.11 2.22 3.33
    "USD  1,234.56" parsed with the facet directly: 1234.56

### Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR | Applied to | Behavior as published | Correct behavior
--- | --- | --- | ---
LWG 427 | C++98 | `money_get` was guaranteed to accept any `CharT` that meets the requirements for a character on which any of the iostream components can be instantiated | only guarantees to accept char, wchar_t and other implementation- defined character types
LWG 2392 | C++98 | only character type `CharT` could be guaranteed to be accepted by `money_get` | can guarantee to accept implementation- defined character container types

### See also

moneypunct | defines monetary formatting parameters used by std::money_get and std::money_put (class template)
money_put | formats a monetary value for output as a character sequence (class template)
get_money (C++11) | parses a monetary value (function template)

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